Lock.



N0. 868,867. PATENTED AUG. 20, 907. J. MILLER.

LOCK.

APPLIOATION IILBD DEC. 3, 1904.

WITNESSES.-

WX M

Q ATTORNEYS.

invention in its inoperative position.

UNITED JAMES B. MILLER, OF KENT, OHIO.

LOOK.

Specification of Letters Patent.

Patented Aug. 20, 1907.

Application filed December 3. 1904. Serial No. 235,384.

To all whom it may concern:

Be it known that 1, JAMES B. MILLER, a citizen of the United States of America, residing at Kent, in the county of Portage and State of Ohio, have invented certain new and useful Improvements in Locks; and I hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

This invention relates to improvements in locks.

The object of this invention is to provide new and improved means for holding the tumbler out of engagement with the bolt, so that the lock can be used as a simple latch when desired.

My invention, therefore, consists in the features of construction and combination of parts as described in the specification, pointed out in the claims and illustrated in the drawings.

Referring to the drawings, Figure 1 is a view of a lock embodying my invention, with one side removed, showing, the arrangement of the mechanism with my Fig. 2 'is a section on line 22, Fig 1. Fig. 3 is a view similar to Fig. 1, with part broken away, showing the lock serving as a simple latch, that is capable of being opened from either side of the door, with my invention in its operative position.

In the drawings I have illustrated the mechanism of a combination lock, for it is in combination with such a lock that my invention is particularly valuable.

1 represents the casing which holds the lock mechanism. The spindles 3 and 4, which operate the bolt, are secured together by means of a neck portion 5, which is formed integral with the spindle 4, and enters a socket 6, formed in the spindle 3, and is held in the socket 6 by means of a screw 7. Either spindle, therefore, is free to turn independently of the other spindle. The respective spindles are provided with the usual knobs 3 and 9. On the spindle 3, which carries the inner door knob, is arranged a hub 10 which is provided with a square bore, so that it will turn with the said spindle 3. The hub 10 is provided with two arms 11 and 12, preferably, of the same length. On the spindle 4 which carries the outer door knob is mounted a hub 13, which is likewise provided with two arms 14 and 15. The bolt 16 has a hollow portion 17, which is provided with arms 18 and 19 arranged to straddle the spindles 3 and 4. At the ends of said arms 18 and 19, at each side thereof are formed lugs 22 and 23, respectively. A coiled spring 24 is arranged in the hollow shank portion of the bolt 16, and the other end of said spring abuts against a lug 25 formed in the casing, so as to normally hold the bolt in its outer position. Above the bolt 16 is arranged a tumbler 30 which slides vertically in a guideway formed by lugs 31 formed integral with the casing. The

tumbler 30 is provided with a flange 32, in which is formed a notch 33 arranged to receive the end of the arm 14, when the tumbler is in it lgm e position, thereby preventing any movement ofthe said arm 14 and consequently preventing the outer door knob from being turned. On the upper end of the tumbler 30 is formed a flange 34. 7

Above the bolt spindles is journaled a spindle 40 which is provided with a knob 41. The spindle 40 carries the combination disk 42. On the face of the disk are arranged a series of ridges 43. Around the perimeter of the disk 42 are formed notches 47, and at the side of the disk 42 is arranged a spring 48 which is supported on lugs 49 formed integral with the casing. One end of the spring 48 is held in contact with the perimeter of the disk 42 and when the disk is turned the end of the spring passing over the notches 47 indicates what portion of a revolution the disk has been turned through. A lever 44 for lifting the tumbler is pivoted near the disk 42 on a lug 45 and the free end thereof is arranged to come in contact with the flange 34 of the tumbler 30. A peg 46 is secured on the lever 44 and extends in towards the face of the disk 42, so as to come in contact with the ridges 43. The ridges 43 are so arranged that when the combination disk is turned back and forth, through a whole or part of a revolution a number of times, according to a predetermined plan, the peg 46 will travel from ridge to ridge, constantly moving away from the center, and the free end of the lever 44 will be raised, which in turn lifts the tumbler 30 away from the arm 14, so that the bolt can be operated from the outer side of the door. However, the arrangement is such that if the combination disk is turned beyond a predetermined point or in the wrong direction, the peg 46 will leave the ridges and allow the lever 44 to slip down, thereby permitting the tumbler to again engage with the arm 14.

Now, my invention consists in providing means whereby the tumbler can be lifted and held out of engagement with the arm 14 so that the lock can serve as a simple latch, that is, so the bolt can be drawn back by turning either knob. The arrangement is as follows, in the front end of the casing, above the bolt 16, is formed an opening 60. Within the casing is pivotally mounted a bell-crank lever 61, one arm of which extends under the flange 32 on the tumbler 30, and the other arm extends over in proximity to the opening 60, and the extreme end of this arm is reduced in size as at 62. A plate 63 is arranged in the casing over the opening 60, and on the inner face of this plate is formed a socket 64 adapted to receive the end of the lever 61. A coiled spring 65 is arranged around the reduced por tion 62 of the lever 61, so as to press against the plate 63, and hold it in position behind the opening 60. On the outer face of the plate 63 is formed a lug 66.

- The operation is as follows :When it is desired to use the lock simply as a latch, the lug 66 is shoved down in the opening 60, thereby drawing down the outerend of the lever 61 and raising the inner end which comes in contact with and lifts the tumbler 30, disengaging it from the arm 14. The pressure of the spring against the plate holds the lever in any position in which it is set.

What I claim is:

1. In a lock, the combination of a casing. a bolt, a spindle, means arranged on said spindle for operating said bolt, a tumbler mounted so as to slide vertically in said casing and arranged to come in contact with said means and prevent the operating 01 said bolt, means for operating said tumbler, an opening formed in said casing, a plate arranged behind said opening and provided with a lug extending into said opening, a bellcrank lever pivotally mounted in said casing and having one arm arranged to extend under the tumbler and the other arm extending over in proximity to said plate and a coiled spring arranged to form an operative connection between said plate and the lever, for the purpose set forth.

2. In a lock, the combination of a casing, a belt, a spindle. means arranged on said spindle for operating said bolt, a tumbler arranged to slide vertically in said casing and arranged to come in contact with said means and prevent the operating 01 said bolt, means for operating said tumbler, an opening formed in said casing, a plate ar ranged behind said opening and having on its outer sun face a lug arranged to extend into said opening and on its inner surface a socket, a bellcrank lever pivotally mounted in said casing and having one arm arranged to extend under the tumbler and the other arm extending over in proximity to said plate with its end reduced in size and arranged to enter the socket in said plate, and a coiled spring arranged around the reduced portion of said lever so as to exert a constant pressure on said plate, substantially as described and for the purpose set forth.

In testimony whereof, I sign the foregoing specification, in the presence of two witnesses.

JAMES B. MILLER.

Witnesses .T. EMIL DOSENBACH, MARGARET O. BRIEN. 

